Does the alveolar septum participate in the formation of the Qi blood barrier

The alveolar septum is involved in the formation of the Qi blood barrier. The Qi blood barrier is mainly composed of alveolar epithelial cells, basement membrane, and capillary endothelial cells. As an important component of the alveolar wall, the alveolar septum contains a rich network of capillaries and connective tissue, which directly participate in the barrier function of Qi blood exchange. The Qi blood barrier is a key structure for the exchange of oxygen and carbon dioxide between alveoli and blood, and its thin layer design allows for efficient gas diffusion. The endothelial cells of capillaries in the alveolar septum are closely adhered to the alveolar epithelial cells, sharing a very thin basement membrane and forming the main body of the Qi blood barrier. The elastic fibers and collagen fibers within the alveolar septum not only provide structural support, but also maintain the stability of the barrier. Macrophages in the alveolar septum can clear inhaled particles and reduce interference with barrier function. Alveolar surfactant is secreted by type II alveolar cells, which reduces alveolar surface tension, prevents alveolar collapse, and indirectly ensures the normal functioning of the Qi blood barrier.

maintaining lung health helps stabilize the function of the Qi blood barrier. It is recommended to avoid smoking and exposure to secondhand smoke, and reduce exposure time in air polluted environments. Moderate aerobic exercise can enhance lung capacity, and a balanced diet should include more foods rich in antioxidants. Pay attention to lung function indicators during regular physical examinations. If there is persistent cough or difficulty breathing, seek medical attention promptly to investigate lung diseases.